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Silver modified SBA-15 for Iodine entrapment

Abstract : A green solvent-free approach was used to produce grey coloured Ag/AgNO3 functionalised SBA-15. This easy to handle powder was then used to extract molecular Iodine from cyclohexane by simple addition and filtration. The resulting yellow powder was examined by UV-Vis, FT-IR, XRD, TGA and SEM/TEM. It was found that nanosized AgI particles were now present on/in the porous silica support. Despite numerous washing steps with a range of solvents (ranging from cyclohexane to water) no leeching was observed. The sorbent proved highly efficient extracting 0.46 moles of I2 for every mole of silver, almost 1:1 Ag:I. Finally, TGA demonstrated an increased melting point for AgI indicating a degree of protection from the silica support. This is important when considering transformation into the final waste form.
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Submitted on : Thursday, February 10, 2022 - 12:07:47 PM
Last modification on : Tuesday, September 13, 2022 - 10:43:16 AM
Long-term archiving on: : Wednesday, May 11, 2022 - 6:32:43 PM

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Micheal P Moloney, Nicolas Massoni, Hans-Conrad Zur Loye, Shani Egodawatte, Agnes Grandjean. Silver modified SBA-15 for Iodine entrapment. Journal of Inorganic and Organometallic Polymers and Materials, Springer Verlag (Germany), 2020, 30 (7), pp.2756-2763. ⟨10.1007/s10904-020-01447-3⟩. ⟨cea-03564253⟩

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